cohoRt - R for risk
case serIes - I for intervention
case contrOl - O for outcome
"Cohort study
A study in which a defined group of people (the cohort) is followed over time, to examine associations between different interventions received and subsequent outcomes.
Case series
Observations are made on a series of individuals, usually all receiving the same intervention, before and after an intervention but with no control group."
Case control
"[...] an outcome of interest is first defined and then subjects are selected with (cases) and without (controls) the designated outcome. The investigator then looks back in time to compare the two groups for a risk factor or other exposure or treatment of interest. Therefore, the case-control study design is inherently retrospective."
step1dreamteamHow possibly is this a case series? The kids receive a new Tx (acupuncture). Case series is an observational study (researcher do not have an impact on pts- only observation).+3
athenathefirstYeah I had the same issue with this Q. I was between case series and Historic cohort. But here we are looking to evaluate the feasibility of an intervention, in other words we are looking at the future, prospectively so it can't be "historic cohort".+
athenathefirstYeah I had the same issue with this Q. I was between case series and Historic cohort. But here we are looking to evaluate the feasibility of an intervention, in other words we are looking at the future, prospectively so it can't be "historic cohort".+
submitted by โfocus(45)
A mnemonic I use:
cohoRt - R for risk case serIes - I for intervention case contrOl - O for outcome"Cohort study A study in which a defined group of people (the cohort) is followed over time, to examine associations between different interventions received and subsequent outcomes.
Case series Observations are made on a series of individuals, usually all receiving the same intervention, before and after an intervention but with no control group."
Source: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5513097/
Case control "[...] an outcome of interest is first defined and then subjects are selected with (cases) and without (controls) the designated outcome. The investigator then looks back in time to compare the two groups for a risk factor or other exposure or treatment of interest. Therefore, the case-control study design is inherently retrospective."
Source: https://academic.oup.com/neurosurgery/article/84/4/819/5237441